File: Utility_Scripts/Toggle_CATIA_No_Start_Document.py
Version: 1.0
Document Type: None required

Adds or removes the CATNoStartDocument=yes line in the CATIA V5 environment files located at C:\ProgramData\DassaultSystemes\CATEnv\. When the setting is present, CATIA opens without creating a blank document on startup. When removed, CATIA reverts to its default behaviour.

1. Run the script
2. A dialog lists all detected CATIA versions — check the ones to update
3. Select Add to suppress the blank document, or Remove to restore it
4. Click Apply — a results dialog shows what was changed or skipped

• If CATNoStartDocument is already present with a different value, Add will replace it with yes
• If the setting is not present, Remove reports "Setting not present" and skips that version
• Changes take effect the next time CATIA is launched